Very kind words. Please add Woosh to the main credits:

T = TT_Tommy
J = jcb-memphis
W=Woosh

What is amazing....it is so easy and you get power. A very brave person could just cut the muffler off and go from cat to pipe, but this is so simple that it begs to be done. And it is the rare thing in P car land that gives power and is cheap....very cheap.

Thanksl for the note and I am glad you are happy. If people ask about this mod, I think it is important to read this thread from the start and evaluate all the pictures....movies......most issues have been addressed to date.

To all those thinking of it, I still like it on 3 months+. It even feels faster somehow.


JB

 

Yo boyz,

Yeah, great mod for sure.

great weekend comin' up!

Thanks to Jeff for running with the ball and getting it dyno'd by WOOSH

You guys rock


tw

 

Hi Richard,

Please exuse my ignorance, but in referring to the rear cats, you mean the ones furtherest from the driver , right?

Also, was anything else done to make exhaust lighter?

 

I did mine a couple of months ago. I used the unibit and speed bore extension. At first I left it at 1" but after a week I went to 2". So far very happy. No cels. Great sound. Thanks to everyone that has helped in this thread.

 

>Just wanted to say 3 weeks later what a great mod this is, thanks guys !

 

Excuse my english, but I am a spanish speaker so I do not know what is a hiss or hisses? Can someone explain me? THANKS!!!

 

the 400 cell cats are indeed the ones furthest from the driver and removing these alone will significantly cut the weight as they are big items. I only run with the front cats in 100 cell race format and have never had a CEL

 

When we talk about the hissing, it is the sound the muffler makes as the exhaust airflow is being forced out. On the stock exhaust, all the air is routed through the Muffler, so the sound is dampend or muffled. On the muffler-bypass, much of the airflow is routed straight out of the tailpipe causing a sound somewhat like what you hear from the air-hose you use to fill your tires. Basically the "hissing" is the sound of compressed exhaust gases being dumped overboard. I would venture to say you will always have some of this sound unless your downstream pipes are bigger than the Cat's, or the routing is very laminar. That being said, most of the hissing is covered up by engine tone. I hope that help...somewhat tough to explain.

 

Thanks.

I have the stock exhaust out at the moment and thinking of removing the rear cats(as well as putting 100 cel up front).

My local exhaust guy has not worked on Porsche exhaust beforw, so any advice on the best way of removing cats would be appreciated.

 

I did mine a while back with the #9 unibit. I want my holes bigger now- how can I accomplish that? The unibit tip hits the muffler, so that's not going to work. Is there a bigger bit I can use? Want to go to 1 1/2 inches.

 

I have looked myself for a hole saw bit that will fit the extension I have for my drill. The only thing I have found is 1 1/4" bits that will fit the extension. Anything over this seems to need a tool that is actually a chuck like the one on your drill, that has about 8 inches of extension to it(not cheap). I still don't think it would work. So, for now I am stuck at 1 1/4". Even if I were to use a bigger hole saw, the guide bit would go thru the back of the exhaust. If you could find a way to get a bigger hole saw and take out the guide bit, you could do it. After checking at HD, Lowes, Ace, my local hardware store, and a place here in Houston called Cirlce Saw(no ****) I gave up and bought an exhaust from a 6speed online member. I recommend the same, or the new exhaust design John D. is selling here.

 

THAKS FOR THE EXPLANATION!!!!!!!!!!!!!!!!!!!!!

 

I used the #9 unitbit to drill my first holes. Then, I wanted more.....

So I drilled a second hole right next to the first, but over-lapping the first a bit. This created a "figure 8" in there that I then was able to move the drill bit to get rid of the points in the middle....this creating a pretty large, oval shaped hole.

I may do it again and get a third attempt in soon...why? I dunno. More has to be better, right?

 

would've have tried this before getting the europipe....but it's too late now.

 

if you modd the oem and it works then get ready to take over Ruf Mod's : >